KR20040087248A - Light Source Device For Electronic Photographic Apparatus - Google Patents

Light Source Device For Electronic Photographic Apparatus Download PDF

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Publication number
KR20040087248A
KR20040087248A KR1020030079395A KR20030079395A KR20040087248A KR 20040087248 A KR20040087248 A KR 20040087248A KR 1020030079395 A KR1020030079395 A KR 1020030079395A KR 20030079395 A KR20030079395 A KR 20030079395A KR 20040087248 A KR20040087248 A KR 20040087248A
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South Korea
Prior art keywords
light emitting
light source
led
light
source device
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KR1020030079395A
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Korean (ko)
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KR100984731B1 (en
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데라다도시유키
세키도게이조
가토시게카즈
이리토노기미히로
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스탠리 일렉트릭 컴퍼니, 리미티드
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05Combinations of cameras with electronic flash apparatus; Electronic flash units
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161Disposition
    • H01L2224/16151Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/16221Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/16225Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/00014Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)
  • Stroboscope Apparatuses (AREA)
  • Led Device Packages (AREA)

Abstract

PURPOSE: A light source for photography is provided to enhance the lighting effect by the light distribution in accordance with the range of photography and to obtain sufficient brightness from a small-sized light source by applying driving currents with pulse typed high power. CONSTITUTION: A light source(1) for photography comprises a white light emitting source including at least one LED(Light Emitting Device) elements(2) and a case(3) receiving the light emitting source and having a lens. The LED elements are aligned on the row along the irradiation range. The lens has a linear fresnel cut(3a) which forms a straight line in the aligning direction of the LED elements.

Description

사진촬영용 광원장치{Light Source Device For Electronic Photographic Apparatus}Light source device for photography {Light Source Device For Electronic Photographic Apparatus}

본 발명은 근래 증가하고 있는 디지털 카메라가 함께 설치된 휴대전화, 휴대용 컴퓨터 등의 휴대용 기기에 있어서, 예를 들어, 밤시간대 혹은 어두운 실내에서 촬영할 때, 조명용 광원으로서 상기 휴대용 기기에 부속되는 광원장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable device such as a mobile phone or a portable computer equipped with an increasing number of digital cameras, for example, to a light source device attached to the portable device as a light source for illumination when shooting in a night time or in a dark room. will be.

종래의 이러한 종류의 LED 소자를 발광원으로 채용한 조명장치로는, 바람직하게는 적(R), 녹(G), 청(B)의 삼원색의 LED 소자 각 1개를 입체회로 형성품(MID; Molded Interconnect Device)에 형성한 오목한 부분 안에 설치하고, 각각의 LED 소자로부터의 발광색을 혼색하여 연색성을 자유롭게 조정하는 광원이 있었다(예를 들어, 일본특허공개 평11-163412호 공보(단락 20-82, 도 1-24))As a lighting apparatus employing this type of conventional LED element as a light emitting source, preferably, each of the three primary color LED elements of red (R), green (G), and blue (B) is formed of a three-dimensional circuit formed product (MID). There was a light source which was installed in a recess formed in a Molded Interconnect Device, and mixed light emission color from each LED element to adjust color rendering freely (for example, see Japanese Patent Application Laid-Open No. 11-163412 (paragraph 20-). 82, FIGS. 1-24))

하지만, 상술한 종래 구성의 광원, 예를 들어, R, G, B 한개씩을 조합하여 하나의 조로 하는 LED 소자에 의한 광원으로부터의 광출력은, 사진을 찍기에 광량이 부족하였다. 따라서 필요한 조명조도를 얻을 수 있을 때까지, 사용하는 LED 소자의 갯수를 늘려야했다. 이 때, 3원색 혹은 특허문헌 1과 같이 4색의 LED 소자를 채용하는 경우에는, 광량을 늘리기 위해 3개(혹은 4개) 단위로 LED 소자를 늘려야 하기 때문에, 조명장치의 대형화가 현저해진다.However, the light output from the light source by the light source of the conventional structure mentioned above, for example, R, G, and B combined in one set, was insufficient in taking a picture. Therefore, the number of LED devices used had to be increased until the required illumination intensity was obtained. At this time, in the case of employing three primary colors or four color LED elements as in Patent Document 1, the LED elements must be increased in units of three (or four) in order to increase the amount of light.

조명장치가 설치되는 대상이 휴대전화와 같은 소형기기이기 때문에, 사진촬영을 위한 충분한 밝기를 우선시하여 LED 소자의 갯수를 설정하면 대형화에 의해 조명장치의 설치자체가 어려워지는 문제점이 발생하고, 역으로 탑재가능한 LED 소자의 수를 우선시하면 조도 부족으로 인해 만족할 만한 품질의 사진을 얻을 수 없다는 문제점이 발생한다.Since the target of the lighting device is a small device such as a mobile phone, if the number of LED elements is set by giving priority to sufficient brightness for photography, the installation of the lighting device becomes difficult due to the large size. Prioritizing the number of LED elements that can be mounted causes a problem that a picture of satisfactory quality cannot be obtained due to lack of illumination.

도 1은 본 발명에 따른 사진촬영용 광원장치의 제 1 실시예를 나타내는 정면도이다.1 is a front view showing a first embodiment of a light source device for photographing according to the present invention.

도 2는 도 1의 A-A선에 따른 단면도이다.2 is a cross-sectional view taken along the line A-A of FIG.

도 3은 도 1의 B-B선에 따른 단면도이다.3 is a cross-sectional view taken along line B-B of FIG. 1.

도 4는 본 발명에 따른 사진촬영용 광원장치에 채용되는 LED 소자의 구성예를 나타내는 단면도이다.4 is a cross-sectional view showing an example of the configuration of the LED element employed in the light source device for photographing according to the present invention.

도 5는 LED 소자의 배광특성의 예를 나타내는 그래프이다.5 is a graph showing an example of light distribution characteristics of an LED element.

도 6은 LED 소자의 구동전류의 예를 나타내는 설명도이다.6 is an explanatory diagram showing an example of a drive current of an LED element.

도 7은 본 발명에 따른 사진촬영용 광원장치의 제 2 실시예에서, LED 소자의 배치상태를 나타내는 정면도이다.Fig. 7 is a front view showing the arrangement of the LED elements in the second embodiment of the light source device for photographing according to the present invention.

도 8은 본 발명에 따른 사진촬영용 광원장치의 제 3 실시예를 요부로 나타내는 단면도이다.Fig. 8 is a sectional view showing the third embodiment of the light source device for photographing according to the present invention.

***도면의 주요부분에 대한 부호의 설명****** Explanation of symbols for main parts of drawing ***

1 : 사진촬영용 광원장치 2 : LED 소자1: Light source device for photographing 2: LED element

21 : LED 칩 22 : 투명수지21: LED chip 22: transparent resin

23 : 형광체 3 : 케이스23 phosphor 3: case

3a : 리니어프레넬컷 3b : 회로기판3a: Linear Fresnel Cut 3b: Circuit Board

4 : 스프링 접합편 5 : 글라스 기판4: spring junction piece 5: glass substrate

5a : 투명전극5a: transparent electrode

본 발명은 상술한 종래의 과제를 해결하기 위한 구체적 수단으로서, 휴대용 기기에 함께 설치되는 카메라의 조명용으로 설치되는 사진촬영용 광원장치에 있어서, 상기 사진촬영용 광원장치는 적어도 1개의 LED 소자를 포함하는 백색 발광원과, 상기 발광원을 수용하고 렌즈를 가지는 케이스를 포함하여 구성되며, 상기 발광원의 상기 LED 소자는 조사범위의 길이방향을 따르는 열에 정렬되고, 상기 렌즈는 상기 LED 소자의 정렬방향으로 직선이 생기도록 된 리니어 프레넬컷을 구비하는 것을 특징으로 하는 사진촬영용 광원장치를 제공함으로써 과제를 해결하는 것이다.The present invention as a specific means for solving the above-described conventional problems, in the light source device for photographing is provided for the illumination of the camera that is installed together in a portable device, the light source device for photographing white includes at least one LED element A light emitting source, and a case accommodating the light emitting source and having a lens, wherein the LED elements of the light emitting source are aligned in rows along the longitudinal direction of the irradiation range, and the lenses are straight in the alignment direction of the LED elements. The problem is solved by providing a light source device for photography, characterized by including a linear Fresnel cut.

이어서, 본 발명을 도면에 나타내는 실시예에 따라 상세하게 설명한다. 도 1 내지 도 3을 참조하여, 본 발명에 따른 사진촬영용 광원장치(1)의 제 1 실시예를 설명한다. 사진촬영용 광원장치(1)는 휴대용 기기에 설치되는 카메라의 조명용으로 설치되는 것이며, 또한 상기 휴대용 기기는 크기가 작은 휴대전화이기 때문에, 사진촬영용 광원장치(1)로는 소형인 것, 예를 들어 가로폭×세로폭×두께가 9×6×3mm 정도의 칫수 이내인 것이 요구된다.Next, this invention is demonstrated in detail according to the Example shown to drawing. 1 to 3, a first embodiment of a photographing light source device 1 according to the present invention will be described. The light source device 1 for photographing is installed for illumination of a camera installed in a portable device, and since the portable device is a small mobile phone, the light source device 1 for photography is small, for example, horizontally. It is required that the width x length width x thickness be within the dimensions of about 9 x 6 x 3 mm.

본 발명에서도 사진촬영용 광원장치(1)의 발광원으로서는 LED 소자(2)를 채용하고 있으며, 상기 LED 소자(2)는 예를 들어, 회로기판(3b) 위에 적절한 갯수가 설치되고, 더욱이 리니어프레넬컷(linear fresnel cut)(3a)이 설치된 케이스(3)로 덮여 발광방향의 일체화가 이루어지며, 예를 들어 상기 회로기판(3b) 등에 설치된 스프링 접합편(4)에 의한 부착과 전원공급을 겸하는 부착수단 등, 간편한 수단으로 휴대용 기기에 조립할 수 있게 되어 있다.Also in the present invention, an LED element 2 is employed as the light emitting source of the light source device 1 for photographing. The LED element 2 is, for example, provided with an appropriate number on the circuit board 3b, and furthermore, a linear prepress. Covered with a case 3 provided with a linear fresnel cut 3a, the light emitting direction is integrated, and for example, it is attached to the circuit board 3b and the like by the spring joining piece 4 installed on the circuit board 3b. It is possible to assemble the portable device by a simple means such as an attachment means.

그리고, 제 1 실시예에서는 백색광원의 LED 소자(2)를 적절 갯수 채용하고 있다. 한편, 여기서 말하는 상기 LED 소자(2)의 적절 개수란, 한 개 이상이고 휴대전화 등 휴대용 기기를 대형화하는 등의 변경없이 부착할 수 있는 범위의 수이며, 상기에 설정되는 케이스(3)의 칫수에서는 4개(도시한 상태) 내지 8개 정도이다. 그리고, 상기 LED 소자(2)는 도 3에 나타내는 바와 같이 조사범위의 길이방향을 따라 1열 또는 복수열로 정렬되어 있다. 여기서 말하는 조사범위란, 본 광원장치가 광을 조사하는 범위를 말한다.In the first embodiment, an appropriate number of LED elements 2 of a white light source is employed. In addition, the suitable number of the said LED elements 2 here is one or more, and is the number of the range which can be attached without changing, such as making a portable apparatus, such as a mobile phone large, and the dimension of the case 3 set above. In the range of four (shown) to eight. As shown in Fig. 3, the LED elements 2 are arranged in one column or in a plurality of rows along the longitudinal direction of the irradiation range. The irradiation range here means the range to which this light source apparatus irradiates light.

도 4는 제 1 실시예가 채용하는 백색광원 LED 소자(2)의 구성예를 나타내는 것이며, 청색을 발광하는 LED 칩(21)을 에폭시 수지 등 투명수지(22)로 덮어 방습할 때, 이 투명 수지(22) 안, 혹은 그 일부에 형광체(23)를 습화(濕和)해 둠으로써, LED 칩(21)의 발광에 의해 형광체(23)를 여기시켜 백색광을 얻는 것이며, 조합하는 형광체(23)로는 YAG, In계라고 불리는 황색발광하는 것이 선택되는 경우와,각각이 R(적), G(녹), B(청)의 삼원색 발광하는 것을 조합한 형광체(23)가 선택되는 경우가 있다.Fig. 4 shows a structural example of the white light source LED element 2 employed in the first embodiment, which is transparent when the LED chip 21 emitting blue light is covered with a transparent resin 22 such as an epoxy resin and moisture-proofed. (22) The phosphor 23 is moistened inside or a part thereof to excite the phosphor 23 by light emission of the LED chip 21 to obtain white light, and the phosphor 23 to be combined. As the yellow light emitting material called YAG or In system, the phosphor 23 may be selected by combining three primary colors of R (red), G (green), and B (blue).

어느 경우에도, LED 칩(21)으로부터의 광은 형광체(23)에 닿게 되므로, 광은 확산되어 배광특성(D)은 도 5에 나타내는 바와 같이, 밝기가 50%로 저하할 때의 각도, 즉 반감각(半減角)이 한 쪽 약 60°정도로 넓으며, 이러한 종류의 사진에 설정되어 있는 사각(寫角) 값, 한 쪽 약 25°에 비하여 넓은 범위로 확산된다.In either case, since the light from the LED chip 21 comes into contact with the phosphor 23, the light is diffused and the light distribution characteristic D is shown in FIG. 5, that is, the angle when the brightness is reduced to 50%, that is, The half sense is wide at about 60 ° on one side, and diffuses in a wider range than the square value set on this type of photograph, about 25 ° on one side.

이는 사진촬영에 불필요한 범위까지 광을 배포하게 되어 즉, 필요한 범위의 단위 면적당 배포되는 광량은 감소하게 된다. 또한, 상기 LED 소자(2)로부터 방사되는 광은, 광속(光束)의 단면이 대략 원형의 배광형상을 가지며, 이에 반하여 카메라는 대략 직사각형의 범위를 촬영하는 것이기 때문에, 배광이 형상적으로도 달라, 조명을 한층 어둡게 한다.This distributes the light to a range unnecessary for photographing, that is, the amount of light distributed per unit area of the required range is reduced. The light emitted from the LED element 2 has a substantially circular light distribution in the cross section of the light beam, whereas the light distribution is different in shape since the camera photographs a substantially rectangular range. , Dimming the lighting even further.

본 발명에서는 상기 문제점에 대처하기 위하여 상술한 바와 같이, 케이스(3)에 리니어프레넬컷(3a)을 한 것으로, 이 리니어프레넬컷(3a)은 도 3에 나타내는 바와 같이, 조사범위의 길이방향에 직교하는 단면에 볼록렌즈(P)를 설정하고, 이 볼록렌즈(P)를 프레넬화한 단면형상을 케이스(3) 위에서 조사범위의 길이방향에 따라 평행이동시킴으로써 얻어지는 리니어프레넬렌즈를 채용한다.In the present invention, in order to cope with the above-mentioned problem, as described above, the case 3 has a linear Fresnel cut 3a. The linear Fresnel cut 3a is located in the longitudinal direction of the irradiation range as shown in FIG. A linear Fresnel lens is obtained by setting the convex lens P in the cross section orthogonal and moving the cross-sectional shape obtained by Fresneling the convex lens P on the case 3 in parallel in the longitudinal direction of the irradiation range.

이와 같이 함으로써, 사진의 짧은변측에 대해서는 반감각이 20°정도인 광의 수속(收束)이 이루어지고, 긴변측에는 반감각이 35° 정도인 수속이 이루어지게 되어, 본 발명에 따르면, 본래 광량이 적은 LED 소자(2)로부터의 광을 적절히 수속하여, 카메라가 촬영하는 범위내로 효율적으로 배포할 수 있게 된다.In this way, convergence of light having a half sense of about 20 ° is performed on the short side of the photograph, and convergence of about 35 ° on the half side of the long side is achieved. A small amount of light from the LED element 2 can be properly converged and distributed efficiently within the range that the camera photographs.

상기에 설명한 리니어프레넬컷(3a)의 채용에 더하여, 본 발명에서는 상기 LED 소자(2)의 점등방법도 연구하였으며, 도 6은 상기 LED 소자(2)에 인가하는 전류파형(W)의 형상의 예를 나타내는 것으로, 상기 전류파형(W)의 기본형상은 인가시간(t)과 배율(b)에 의한 단일펄스의 대략 직사각형 형상이며, 본 실시예에서는, 인가시간(t)으로는, 본 발명과 같은 광원장치의 발광시간으로 통상 요구되는 10~600msec가 설정되고, 이에 따라, 배율(b)로는 정격전류의 3~50배가 설정되어 있다. 단, 인가시간(t)과 배율(b)은 대체로 반비례의 관계에 있어, 배율(b)을 크게 설정할 때에 인가시간(t)은 짧게 설정하는 것이 바람직하다.In addition to the adoption of the linear Fresnel cut 3a described above, the present invention also studied the lighting method of the LED element 2, and FIG. 6 shows the shape of the current waveform W applied to the LED element 2. For example, the basic shape of the current waveform (W) is a substantially rectangular shape of a single pulse by the application time (t) and the magnification (b), in the present embodiment, the application time (t), the present invention 10 to 600 msec, which is usually required for the light emission time of the light source device as described above, is set. Accordingly, the magnification b is set to 3 to 50 times the rated current. However, since the application time t and the magnification b are generally in inverse proportion, it is preferable to set the application time t short when setting the magnification b large.

여기서, 상기 LED 소자(2)로부터의 발광량은 거의 인가되는 전류량에 비례하기 때문에, 예를 들어, 50배의 전류를 인가한다는 것은, 같은 점등시간이라면, 50배수의 LED 소자(2)를 설치한 것과 등가의 밝기가 얻어지게 된다. 한편, 실제로는 인가하는 전류가 증가함에 따라 광량에 거의 포화의 경향이 나타나게 되어, 정확하게는 50배의 밝기가 얻어지지 않기 때문에, 적절한 보정이 필요하다.Here, since the amount of light emitted from the LED element 2 is almost proportional to the amount of current to be applied, for example, applying 50 times the current means that 50 times the LED element 2 is provided if the same lighting time is provided. The brightness equivalent to that is obtained. On the other hand, as the current to be applied actually increases, the tendency of the saturation to the amount of light appears almost, and since the brightness of 50 times is not obtained correctly, appropriate correction is necessary.

한편, 휴대전화 등 휴대용 기기에서는 사용되고 있는 전원이 전지 등으로, 비교적 전원전압이 낮고, 또한 전류용량도 적기 때문에, 상술한 바와 같이 LED 소자(2)에 정격전류 이상의 전류를 흘리기 위해서는, 전원전압 이상의 전압이 요구되는 경우도 당연히 발생한다. 또한, 필요한 밝기를 얻기 위하여 LED 소자(2)에 정격전류의 50배의 전류를 흘려야 하는 경우, 정격전류가 20mA라면, 필요한 전류치는 LED 소자(2) 1개당 1A가 되며, LED 소자(2)의 사용 갯수에 따라서는 전원용량을 넘게되는 상황도 예상된다.On the other hand, since a power source used in a portable device such as a cellular phone is a battery or the like and has a relatively low power supply voltage and a small current capacity, in order to flow a current above the rated current to the LED element 2 as described above, Naturally, a voltage is required. In addition, when a current of 50 times the rated current must be flowed to the LED element 2 in order to obtain the required brightness, if the rated current is 20 mA, the required current value is 1 A per LED element 2, and the LED element 2 Depending on the number of uses, the situation may exceed the power supply capacity.

따라서, 휴대용 기기내에는, 예를 들어, 인버터 회로 등에 의해 필요한 전압까지 승압하는 승압수단 및, 이 승압한 전압에서의 필요전력을 상기 LED 소자(2)에 공급할 때까지 보유해 두는 콘덴서 회로 등에 의한 전력의 보유수단 등도 필요에 따라 설치하는 것이 바람직하다.Therefore, in the portable device, for example, by a boosting means for boosting up to a required voltage by an inverter circuit or the like, and a capacitor circuit for retaining the required power at the boosted voltage until the LED element 2 is supplied. It is preferable to provide the power holding means and the like as necessary.

여기서, 채용하는 LED 소자(2)가 청색발광의 LED 칩(21)과 황색발광의 형광체(23)의 조합인 경우, 확실히 발광색은 백색이긴 하지만, 조사광안에 적색 성분이 적어, 이 LED 소자(2)로부터의 광으로 조사된 피사체를 촬영한 사진은 청색을 띄게 되어, 안색이 나빠보이는 등 보는 사람에게 적지 않은 위화감을 주게 된다. 그래서, 본 발명에서는 도 2에도 나타내는 바와 같이 예를 들어, 4개의 LED 소자(2) 중 적어도 1개를 적색 발광하는 적 LED 소자(2R)로 함으로써 적색광을 보강하여, 사진촬영용 광원장치(1)의 연색성을 향상시켜 위화감을 주지 않도록 하는 경우도 있다.Here, in the case where the LED element 2 employed is a combination of the blue light emitting LED chip 21 and the yellow light emitting phosphor 23, the light emitting color is certainly white, but there are few red components in the irradiated light. The photograph taken of the subject irradiated with the light from 2) becomes blue and gives a lot of discomfort to the viewer such as the complexion looks bad. Therefore, in the present invention, as shown in Fig. 2, for example, at least one of the four LED elements 2 is a red LED element 2R emitting red light, thereby reinforcing the red light, and thereby taking the light source device 1 for photography. In some cases, the color rendering properties may be improved to prevent discomfort.

한편, 백색광원의 LED 소자(2)는 근자외발광의 LED 칩(21)과 삼원색의 형광체(23)를 조합하여 백색광을 얻는 방식도 있으며, 이 방식에 의한 것을 발광원으로 채용하는 경우에는, 방사되는 광에 R(적), G(녹), B(청)의 삼원색이 포함되어 있기 때문에, 적 LED 소자(2R)을 추가할 필요가 없어, 상기예의 경우 4개 모두를 백색발광의 LED 소자(2)로 하는 것도 가능해진다.On the other hand, the LED element 2 of the white light source also has a method of obtaining white light by combining the LED chip 21 of the near-ultraviolet light emission and the phosphor 23 of three primary colors. Since three primary colors of R (red), G (green), and B (blue) are included in the emitted light, there is no need to add a red LED element 2R. In the above example, all four LEDs emit white light. It is also possible to use the element 2.

한편, 도 2에 부호 4로 나타내는 것은 사진촬영용 광원장치(1)에 전원을 공급하기 위한 스프링 접합편이며, 도면에서 이점쇄선으로 나타내는 바와 같이 휴대용 기기안에 부착할 때에는, 휴대용 기기 본체(10)의 오목한 부분(10a) 안에 설치된 접점(11)에 하우징 커버(12)로 꽉 누르는 등 스프링 접합편(4)의 탄성을 이용하여 휴대용 기기에 조합하여, 조립작업의 간소화를 꾀하는 것이다.On the other hand, the reference numeral 4 in Fig. 2 is a spring joining piece for supplying power to the light source device 1 for photographing, and as shown by the double-dotted line in the figure, The housing 11 is pressed against the contact 11 provided in the concave portion 10a to be combined with a portable device by using the elasticity of the spring joining piece 4 to simplify the assembly work.

본 발명에 의해 이상에 설명한 구성으로 함으로써, 휴대전화 등 소형 휴대용 기기에 (디지털)카메라를 장착할 때, 밤시간 등 외광이 부족한 조건에서도 촬영가능하게 하는 사진촬영용 광원장치(1)를 휴대전화 등의 대형화를 초래하지 않고 설치할 수 있게 된다.According to the present invention, when the (digital) camera is mounted on a small portable device such as a mobile phone, the light source device 1 for photography can be photographed even under conditions such as a night time when the external light is insufficient. It can be installed without causing an increase in size.

도 7은 본 발명에 따른 사진촬영용 광원장치(1)의 제 2 실시예이며, 앞의 실시예에서는 발광원으로서 백색광원의 LED 소자(2)를 사용하였는데, 촬영할 화상이 컬러 화상인 경우에는, 예를 들어 삼원색의 형광체를 사용했을 때에도 백색광의 색온도가 고정되어, 품질이 그렇게 높다고는 할 수 없기 때문에, 예를 들어, 태양광에서 촬영한 화상과, 사진촬영용 광원장치(1)의 조명광에 의해 촬영한 화상에 색채의 위화를 일으켜 사용자에게 위화감을 일으키게 될 가능성이 높았다.Fig. 7 is a second embodiment of the light source device 1 for photographing according to the present invention. In the previous embodiment, the LED element 2 of the white light source is used as the light emitting source. When the image to be photographed is a color image, For example, even when three primary colors of phosphor are used, the color temperature of the white light is fixed and the quality is not so high. For example, the image photographed by sunlight and the illumination light of the photoelectric light source device 1 It was highly likely that color images would be distorted in the photographed image, causing discomfort to the user.

그래서, 이 실시예에서는 LED 소자(2)에, 적색발광하는 적 LED 소자(2R)와, 녹색발광하는 녹 LED 소자(2G)와, 청색발광하는 청 LED 소자(2B)의 삼원색을 발광하는 것을 조합하여, 각 색의 혼합비를 이른바 백색의 범위내에서 조정함으로써, 조명광의 색온도를 조정하여, 태양광으로 촬영했을 때와의 발색(發色)을 통일하는 것이다.Therefore, in this embodiment, the LED element 2 emits the three primary colors of the red LED element 2R emitting red light, the green LED element 2G emitting green light, and the blue LED element 2B emitting blue light. In combination, by adjusting the mixing ratio of each color within the so-called white range, the color temperature of the illumination light is adjusted to unify the color development when shooting with sunlight.

여기서, 발명자에 의한 시험제작, 실험, 검토의 결과에 따르면, 상기 LED 소자(2)가 발하는 광은, 한 지점으로부터 방사되는 비교적 지향성이 강한 광이기 때문에, 이 실시예와 같이 3개의 LED 소자(2)를 조합시키면 색의 혼합이 충분히 이루어지지않고, 예를 들어, 얼굴 반쪽이 붉게 되거나, 얼굴 반쪽이 푸른기를 띠는 등의 현상을 일으키는 것이 판명되었다.Here, according to the results of the test production, experiment, and examination by the inventors, since the light emitted by the LED element 2 is a relatively directional light emitted from one point, three LED elements ( The combination of 2) proved to cause a phenomenon such as insufficient mixing of colors, for example, redness of the half of the face, and bluishness of the half of the face.

따라서, 이 실시예는 각 색의 혼합을 한층 좋게 하기 위하여 삼원색의 LED 소자(2)(R, G, B)를 매트릭스 형태로 배치하며, 이 매트릭스의 행 및 열의 수를 적어도 색의 갯수, 즉 3이상으로 하여, 어느 행 및 열에서도 반드이 3가지 색이 배치되게 하고 있다. 한편, 도 7에서는 각 색의 LED 소자(2)(R, G, B)의 배치 상태를 명확하게 나타내기 위하여 렌즈(4) 등은 생략하였다.Therefore, this embodiment arranges the LED elements 2 (R, G, B) of the three primary colors in a matrix form in order to further enhance the mixing of each color, and the number of rows and columns of the matrix is at least the number of colors, that is, At least three, the three colors are arranged in any row and column. In FIG. 7, the lens 4 and the like are omitted in order to clearly show the arrangement of the LED elements 2 (R, G, B) of each color.

이와 같이 함으로써, LED 소자(2)(R, G, B)의 각 색에 주는 전류치를 조정함으로써 광원색의 색온도의 설정을 자유롭게 하여, 예를 들어, 5000~6000 켈빈 등 태양광에 근사한 색온도로 하여, 주간에 태양광으로 촬영한 사진과의 색채의 차이를 적게 하고, 위화감을 주지 않게 할 수 있다. 또한, 삼원색의 혼색도 좋아져 부분적으로 색번짐을 일으키는 것도 해결된다.In this way, the color temperature of the light source color can be set freely by adjusting the current value given to each color of the LED element 2 (R, G, B), and setting the color temperature close to sunlight, for example, 5000 to 6000 Kelvin. In addition, it is possible to reduce the color difference from the photo taken with sunlight during the day and to prevent discomfort. In addition, the mixing of the three primary colors is also improved, causing partial color bleeding is also solved.

도 8은 본 발명의 제 3 실시예이다. 상기 제 2 실시예에서도 자세히 보면, R, G, B의 발광위치가 각각이 독립되어 있어, 예를 들어, 피사체에 매우 근접한 상태에서는 색번짐이 발생할 가능성을 부정할 수 없었다. 이에, 이 제 3 실시예는 LED 칩(21) 자체가 투명하다는 것을 이용하여 색의 교차을 방지하려고 하는 것이다.8 is a third embodiment of the present invention. Also in detail in the second embodiment, the light emitting positions of R, G, and B are independent of each other, and thus, for example, the possibility of color bleeding cannot be denied in a state very close to the subject. Thus, this third embodiment attempts to prevent color crossover by using that the LED chip 21 itself is transparent.

따라서, 각 색의 LED 칩(21)(R, G, B)은, 예를 들어 한쪽면에 양음극을 가지는 플립 칩(flip chip) 타입 등으로 형성하여, 각각을 투명전극(5a)이 설치된 글라스 기판(5)위에 마운트하고, 다시 마운트가 이루어진 각 LED 칩(21)(R, G, B)은 상기 사진촬영용 광원장치(1)의 조사방향을 향하여 겹쳐 쌓는다.Therefore, the LED chips 21 (R, G, B) of respective colors are formed, for example, in a flip chip type or the like having a positive cathode on one side thereof, and each is provided with a transparent electrode 5a. Each LED chip 21 (R, G, B), which is mounted on the glass substrate 5 and mounted again, is stacked in the direction of irradiation of the light source device 1 for photographing.

또한, 겹쳐 쌓을 때에는, 발광효율이 높은 LED 칩(21)이 아랫층이 되도록 쌓으며, 일반적으로는 아랫층으로부터 적, 녹, 청의 순이 된다. 따라서, 맨 아랫층의 LED 칩(21R)으로부터의 광은 LED 칩(21G)과 LED 칩(21B)을 투과하여 조사방향으로 조사되며, LED 칩(21G)의 발광은 LED 칩(21B)을 투과한다.In addition, when stacking, the LED chip 21 with high luminous efficiency is piled so that it may become a lower layer, and in general, it becomes red, green, and blue in order from a lower layer. Therefore, light from the bottommost LED chip 21R passes through the LED chip 21G and the LED chip 21B and is irradiated in the irradiation direction, and light emission of the LED chip 21G passes through the LED chip 21B. .

이와 같이 함으로써, LED칩(21)(R, G, B)은 한 지점으로부터 방사되는 것과 등가가 되며, 즉 최상단의 LED 칩(21)으로부터 방사되는 광이 R, G, B가 혼합된 백색광이 되기 때문에, 어떻게 피사체에 접근하여 비추더라도 색번짐이 일어나지 않는다.In this way, the LED chips 21 (R, G, B) are equivalent to those emitted from one point, that is, the light emitted from the uppermost LED chip 21 is white light in which R, G, B are mixed. Therefore, no color bleeding occurs even if the subject approaches and shines.

이상에서 설명한 바와 같이, 본 발명에 따라, 휴대용 기기에 함께 설치되는 카메라의 조명용으로 설치되는 사진촬영용 광원장치에 있어서, 상기 사진촬영용 광원장치는 적어도 1개의 LED 소자를 포함하는 백색 발광원과, 상기 발광원을 수용하고 렌즈를 가지는 케이스를 포함하여 구성되며, 상기 발광원의 상기 LED 소자는 조사범위의 길이방향을 따르는 열에 정렬되고, 상기 렌즈는 상기 LED 소자의 정렬방향으로 직선이 생기도록 된 리니어 프레넬컷을 구비하는 것을 특징으로 하는 사진촬영용 광원장치로 함으로써, 적은 수의 LED 소자로 이러한 종류의 휴대용 기기에 함께 설치되는 디지털 카메라의 촬영범위라면 충분한 조명을 가능하게 하고, 더욱이 LED 소자를 사용함으로써 소형화, 고신뢰성, 저비용화 등도 가능하며, 휴대전화 등 이러한 종류의 카메라 부착 휴대용 기기의 상품성의 향상에 매우 뛰어난 효과를 발휘하는 것이다.As described above, according to the present invention, in the photo-shooting light source device installed for illumination of a camera installed together in a portable device, the photo-shooting light source device includes a white light emitting source including at least one LED element, and And a case accommodating the light emitting source and having a lens, wherein the LED elements of the light emitting source are aligned in rows along the longitudinal direction of the irradiation range, and the lenses are linear to form a straight line in the alignment direction of the LED elements. By using a light source device for photographing, characterized by including a Fresnel cut, a sufficient number of LED elements can be used in the shooting range of a digital camera installed together in a portable device of this kind, so that sufficient lighting can be achieved. Miniaturization, high reliability and low cost are also possible. Attached to exert the excellent effects in the improvement of the commercial value of the portable device.

Claims (8)

휴대용 기기에 함께 설치되는 카메라의 조명용으로 설치되는 사진촬영용 광원장치에 있어서, 상기 사진촬영용 광원장치는In the photographing light source device is installed for the illumination of the camera installed together in a portable device, the light source device for photographing 적어도 1개의 LED 소자를 포함하는 백색 발광원과;A white light emitting source comprising at least one LED element; 상기 발광원을 수용하고 렌즈를 가지는 케이스를 포함하여 구성되며,It comprises a case for receiving the light emitting source and having a lens, 상기 발광원의 상기 LED 소자는 조사범위의 길이방향을 따르는 열에 정렬되고, 상기 렌즈는 상기 LED 소자의 정렬방향으로 직선이 생기도록 된 리니어 프레넬컷(linear fresnel cut)을 구비하는 것을 특징으로 하는 사진촬영용 광원장치.The LED elements of the light emitting source are arranged in rows along the longitudinal direction of the irradiation range, and the lens has a linear fresnel cut such that a straight line is formed in the alignment direction of the LED elements. Light source device for shooting. 제 1 항에 있어서,The method of claim 1, 상기 LED 소자의 점등시에는 LED 소자 정격의 3~50배의 전류로 10~600msec의 점등시간을 가지는 구동이 이루어지는 것을 특징으로 하는 사진촬영용 광원장치.When the LED device is turned on, the light source device for photography is characterized in that the drive having a lighting time of 10 ~ 600msec with a current of 3 to 50 times the LED element rating. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 발광원은 청색발광 LED 칩과 황색발광 형광체가 조합된 LED 소자를 포함하는 것을 특징으로 하는 사진촬영용 광원장치.The light emitting device of claim 1, wherein the light emitting device comprises a LED device in which a blue light emitting diode chip and a yellow light emitting phosphor are combined. 제 3 항에 있어서,The method of claim 3, wherein 상기 발광원은 적어도 1개의 적색발광 LED 소자를 더 포함하는 것을 특징으로 하는 사진촬영용 광원장치.The light emitting device of claim 1, further comprising at least one red light emitting LED element. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 발광원은 근자외발광 LED 칩과 삼원색 발광 형광체가 조합된 LED 소자를 포함하는 것을 특징으로 하는 사진촬영용 광원장치.The light emitting device of claim 1, wherein the light emitting device comprises a LED device in which a near-ultraviolet light emitting LED chip and a three primary light emitting phosphor are combined. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 케이스와 상기 휴대용 기기의 전기적 접속은 스프링 접합편에 의해 이루어지는 것을 특징으로 하는 사진촬영용 광원장치.The light source device for photographing, characterized in that the electrical connection between the case and the portable device is made by a spring joining piece. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 발광원은 삼원색의 복수개의 LED 소자이며, 적어도 원색 개수만큼의 행 및 열을 가지는 매트릭스 배열로 이루어진 것을 특징으로 하는 사진촬영용 광원장치.The light emitting device is a plurality of LED elements of three primary colors, and the light source device for photographing, characterized in that the matrix array having at least as many primary and secondary rows and columns. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 발광원은 상기 사진촬영용 광원장치의 조사축방향을 향하여 겹쳐 쌓는 배열이 이루어져 있는 삼원색의 LED 칩들을 포함하는 것을 특징으로 하는 사진촬영용 광원장치.The light emitting device of claim 1, wherein the light source device for photographing comprises three primary color LED chips arranged in a stacking direction toward the irradiation axis of the photographing light source device.
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